Portions of a support base of a stand for an electronic game machine



FIG. 1 is a front, top and right perspective view of portions of a support base of a stand for an electronic game machine showing our new design;

FIG. 2 is a rear, bottom and left perspective view thereof;

FIG. 3 is a top plan view thereof;

FIG. 4 is a bottom plan view thereof;

FIG. 5 is a front view thereof;

FIG. 6 is a rear view thereof;

FIG. 7 is a right side view thereof, a left side view being a mirror image thereof; and,

FIG. 8 is a reference perspective view showing a state where the stand for the electronic game machine is attached onto the support base, as viewed from the rear, bottom and left sides.

The broken lines showing the stand, base and electronic game machine are for illustrative purpose only and form no part of the claimed design. 

The ornamental design for portions of a support base of a stand for an electronic game machine, as shown and described. 